They are great for trying to router very small parts, as they hold everything securely in place for you. Routers are often quite loud, so make sure you wear ear plugs. They can also result in large amounts of dust particles in the air depending on the type of material you are working with. A respirator is a good idea if you are using a router on wood. A tile bit is especially designed for working with anything ceramic or glass. You should only use a tile bit at a very low speed. A chuck key is used to loosen or tighten the chuck. Generally a chuck key comes with your drill when you purchase it. You can by a replacement if necessary. Routers are great power tools for detailing, carving, and engraving. If you have a particular project in mind, searching through all of those manuals can be time consuming. Try using the internet to look up the project you are going to do and you should find information on the best power tools to use for the job. You will likely find some very helpful hints for the project as well. A respirator is a good idea if you will be working with any power tool that creates dust including sanders and routers. It is a good idea to make sure you have a source of fresh air getting into your work area as well. A respirator ensures you won t be inhaling harmful chemicals or dust that is generated. If you are buying it for one specific project and don t think you will use it again, then you can purchase a lower quality power tool for the project. It needs to be high enough quality that it will get you excellent results, but it doesn t have to be a long lasting product. We all know power tools can be expensive, and if you need to purchase several to get a project done then you may need to go with the discount brands. The index and the middle finger are the two generally involved in the accident. The most common power tool involved in these cases are the various types of saws. Of these finger injuries, 55% occurred while operating the power tool at home. According to OSHA, a large portion of power tool injuries occur because the power source is not removed while changing parts on the power tool.